I would like to change all the grass block s in the world to red sand with command blocks I was having problems with /fill. I am just starting to get used to commands and such so simple as possible would be appreciated.

  • Note: /fill is limited to 32768 blocks.
    – Mutantoe
    Commented May 9, 2015 at 15:31
  • Does it have to be done with commands, or would it be fine to generate a world that already has red sand instead of grass?
    – SirBenet
    Commented May 9, 2015 at 17:26

2 Answers 2


This is impossible as of now. You can change only loaded chunks. Unloaded chunks can't be changed.

  • 4
    As the issue is solved @Tebbe2002, would you mind clicking the excepted answer button?
    – Rajat Jain
    Commented May 9, 2015 at 13:09

When you create a flat world there are a little text and the place where it stands air chance it to red_sand.

  • I...think? this tries to answer the question? But I'm finding it really hard to parse.
    – Frank
    Commented May 9, 2015 at 17:01
  • 1
    @Frank I don't think it does. This is about creating a new world whereas OP is asking about editing an existing one. Commented May 9, 2015 at 17:45

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